EP0889603A3 - Transmission diversity apparatus - Google Patents
Transmission diversity apparatus Download PDFInfo
- Publication number
- EP0889603A3 EP0889603A3 EP98112400A EP98112400A EP0889603A3 EP 0889603 A3 EP0889603 A3 EP 0889603A3 EP 98112400 A EP98112400 A EP 98112400A EP 98112400 A EP98112400 A EP 98112400A EP 0889603 A3 EP0889603 A3 EP 0889603A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- switching device
- output
- devices
- switches
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
- H04B7/0608—Antenna selection according to transmission parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
- Radio Relay Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19496897A JP3290926B2 (en) | 1997-07-04 | 1997-07-04 | Transmit diversity device |
JP19496897 | 1997-07-04 | ||
JP194968/97 | 1997-07-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0889603A2 EP0889603A2 (en) | 1999-01-07 |
EP0889603A3 true EP0889603A3 (en) | 2002-07-31 |
Family
ID=16333345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98112400A Withdrawn EP0889603A3 (en) | 1997-07-04 | 1998-07-03 | Transmission diversity apparatus |
Country Status (4)
Country | Link |
---|---|
US (1) | US6226508B1 (en) |
EP (1) | EP0889603A3 (en) |
JP (1) | JP3290926B2 (en) |
CN (1) | CN1211115A (en) |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6396457B1 (en) * | 2000-02-29 | 2002-05-28 | Texas Instruments Incorporated | Concentrator for coupling local wireless networks to a wired network |
JP3679000B2 (en) * | 2000-12-21 | 2005-08-03 | 松下電器産業株式会社 | Wireless transmission apparatus and wireless transmission method |
US6961545B2 (en) * | 2001-04-09 | 2005-11-01 | Atheros Communications, Inc. | Method and system for providing antenna diversity |
JP4252802B2 (en) * | 2001-05-02 | 2009-04-08 | 富士通株式会社 | Transmit diversity system |
WO2003034385A2 (en) * | 2001-10-19 | 2003-04-24 | Clare Micronix Integrated Systems, Inc. | System and method for illumination timing compensation in response to row resistance |
GB0200238D0 (en) * | 2002-01-07 | 2002-02-20 | Imec Inter Uni Micro Electr | Device for improving wireless outdoor-to-indoor digital communication |
CN1327730C (en) * | 2002-07-19 | 2007-07-18 | 国立新加坡大学 | Radio communication equipment and method |
US7171161B2 (en) * | 2002-07-30 | 2007-01-30 | Cognio, Inc. | System and method for classifying signals using timing templates, power templates and other techniques |
US7212788B2 (en) * | 2002-08-13 | 2007-05-01 | Atheros Communications, Inc. | Method and apparatus for signal power loss reduction in RF communication systems |
US8532588B1 (en) | 2002-08-13 | 2013-09-10 | The Connectivity Patent Trust | Apparatus for signal power loss reduction in RF communication systems |
JP2004201188A (en) * | 2002-12-20 | 2004-07-15 | Nec Saitama Ltd | Antenna-switching circuit for portable telephone |
US8743837B2 (en) * | 2003-04-10 | 2014-06-03 | Qualcomm Incorporated | Modified preamble structure for IEEE 802.11A extensions to allow for coexistence and interoperability between 802.11A devices and higher data rate, MIMO or otherwise extended devices |
US7916803B2 (en) | 2003-04-10 | 2011-03-29 | Qualcomm Incorporated | Modified preamble structure for IEEE 802.11a extensions to allow for coexistence and interoperability between 802.11a devices and higher data rate, MIMO or otherwise extended devices |
TWI288537B (en) * | 2003-06-20 | 2007-10-11 | Realtek Semiconductor Corp | Automatic gain control and antenna diversity method of wireless communication system |
KR100608740B1 (en) * | 2003-08-08 | 2006-08-04 | 엘지전자 주식회사 | A method and a apparatus of improvement data receiving capability for mobile phone |
US7586884B2 (en) * | 2003-08-15 | 2009-09-08 | Qualcomm Incorporated | Joint packet detection in wireless communication system with one or more receiver |
JP2005260502A (en) | 2004-03-10 | 2005-09-22 | Nec Corp | Communication equipment and communication control method |
US6946898B1 (en) * | 2004-03-26 | 2005-09-20 | Silicon Laboratories, Inc. | System and method for biasing electrical circuits |
US7155176B2 (en) * | 2004-04-08 | 2006-12-26 | Skyworks Solutions, Inc. | System for synchronizing a portable transceiver to a network |
PT1751890T (en) * | 2004-05-27 | 2017-05-24 | Qualcomm Inc | Modified preamble structure for ieee 802.11a extensions to allow for coexistence and interoperability between 802.11a devices and higher data rate, mimo or otherwise extended devices |
US8352040B2 (en) * | 2005-02-28 | 2013-01-08 | Cardiac Pacemakers, Inc. | Diversity antenna system for communication with an implantable medical device |
US7610065B2 (en) * | 2005-02-28 | 2009-10-27 | Cardiac Pacemakers, Inc. | Method and apparatus for antenna selection in a diversity antenna system for communicating with implantable medical device |
US7392092B2 (en) | 2005-02-28 | 2008-06-24 | Cardiac Pacemakers, Inc. | Method and apparatus for operating a diversity antenna system for communicating with implantable medical device |
EP2016694B1 (en) * | 2006-05-09 | 2019-03-20 | Cognio, Inc. | System and method for identifying wireless devices using pulse fingerprinting and sequence analysis |
EP1953925B1 (en) * | 2007-02-05 | 2009-11-04 | Research In Motion Limited | Multi-mode receiver with adaptive mode selection |
US8532211B2 (en) * | 2009-02-20 | 2013-09-10 | Qualcomm Incorporated | Methods and apparatus for power control based antenna switching |
EP2828982B1 (en) * | 2012-03-23 | 2017-02-08 | Sony Mobile Communications AB | Antenna swapping methods including comparing performance characteristics of first and second antennas, and related portable electronic devices |
US20130265889A1 (en) * | 2012-04-09 | 2013-10-10 | Michael Eoin Buckley | Optimized Uplink Performance via Antenna Selection |
US8953474B2 (en) | 2012-04-09 | 2015-02-10 | Blackberry Limited | Optimized uplink performance via antenna selection |
US9007970B2 (en) | 2012-10-11 | 2015-04-14 | Sony Corporation | Antenna swapping methods including repeatedly swapping between antennas, and related wireless electronic devices |
CN109257082A (en) * | 2017-07-14 | 2019-01-22 | 中兴通讯股份有限公司 | A kind of antenna switching handling method, apparatus and system |
WO2021189388A1 (en) * | 2020-03-26 | 2021-09-30 | 华为技术有限公司 | Wireless communication device and antenna switching method therefor |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0364190A2 (en) * | 1988-10-12 | 1990-04-18 | Sumitomo Electric Industries, Ltd. | Diversity transmission and reception method and equipment |
US5537672A (en) * | 1992-04-28 | 1996-07-16 | Robert Bosch Gmbh | System for bidirectional data transmission between a beacon and a vehicle |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0529990A (en) | 1991-07-18 | 1993-02-05 | Nippon Telegr & Teleph Corp <Ntt> | Transmission diversity equipment |
DE69432844T2 (en) * | 1993-04-29 | 2004-05-19 | Ericsson Inc. | Time diversity transmission system to reduce adjacent channel interference in mobile phone systems |
JP3085042B2 (en) * | 1993-06-29 | 2000-09-04 | 日本電気株式会社 | Interference wave canceller |
JP2876517B2 (en) * | 1994-02-16 | 1999-03-31 | 松下電器産業株式会社 | CDMA / TDD base station apparatus, CDMA / TDD mobile station apparatus, CDMA / TDD wireless communication system, and CDMA / TDD wireless communication method |
JPH0832498A (en) | 1994-07-20 | 1996-02-02 | Nippon Telegr & Teleph Corp <Ntt> | Transmission diversity system |
JPH08195703A (en) * | 1995-01-17 | 1996-07-30 | Toshiba Corp | Radio communication equipment |
JPH08321785A (en) * | 1995-05-24 | 1996-12-03 | Sony Corp | Transmitter, receiver, transmission method, reception method and transmission method |
JPH0918396A (en) | 1995-06-30 | 1997-01-17 | Toshiba Corp | Radio communication equipment and transmission diversity circuit therefor |
US5883921A (en) * | 1995-07-31 | 1999-03-16 | Harris Corporation | Short burst acquisition circuit and method for direct sequence spread spectrum links |
-
1997
- 1997-07-04 JP JP19496897A patent/JP3290926B2/en not_active Expired - Fee Related
-
1998
- 1998-06-25 US US09/104,180 patent/US6226508B1/en not_active Expired - Fee Related
- 1998-07-03 EP EP98112400A patent/EP0889603A3/en not_active Withdrawn
- 1998-07-03 CN CN98115597.9A patent/CN1211115A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0364190A2 (en) * | 1988-10-12 | 1990-04-18 | Sumitomo Electric Industries, Ltd. | Diversity transmission and reception method and equipment |
US5537672A (en) * | 1992-04-28 | 1996-07-16 | Robert Bosch Gmbh | System for bidirectional data transmission between a beacon and a vehicle |
Non-Patent Citations (1)
Title |
---|
SAWAHASHI M ET AL: "TRANSMITTER DIVERSITY EFFECT IN TDMA/TDD MOBILE RADIO TRANSMISSION", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 28, no. 24, 19 November 1992 (1992-11-19), pages 2201 - 2202, XP000319624, ISSN: 0013-5194 * |
Also Published As
Publication number | Publication date |
---|---|
CN1211115A (en) | 1999-03-17 |
JPH1127188A (en) | 1999-01-29 |
JP3290926B2 (en) | 2002-06-10 |
US6226508B1 (en) | 2001-05-01 |
EP0889603A2 (en) | 1999-01-07 |
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RIC1 | Information provided on ipc code assigned before grant |
Free format text: 7H 04B 7/06 A, 7H 04B 7/08 B |
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STAA | Information on the status of an ep patent application or granted ep patent |
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18D | Application deemed to be withdrawn |
Effective date: 20030201 |